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• 2. TEST DURATION AND PROPOSED SCOPE OF WORK <br />' The pilot test is expected to begin in August 2005 The length of the test is dependent on field <br /> analytical data collected during the test Of particular importance will be the effect that chemical <br /> oxidation has on groundwater quality If groundwater quality is protected, the test could <br /> fcontinue for several weeks or months <br /> At the end of the first week of the test, injection of ozone and hydrogen peroxide will be stopped <br /> At this time groundwater samples will be collected from the site to assess groundwater quality <br /> and hydrocarbon concentrations If groundwater conditions are favorable, the pilot test will be <br />' resumed during the third week If the test continues, groundwater sampling and analysis will be <br /> conducted monthly until the end of the test, and I month after the test is terminated The scope <br /> of work and duration of the pilot test may change based on the field conditions and observations <br /> during the course of the pilot test <br /> 2.1 TEST DETAILS <br />' The pilot test will be conducted using a chemical oxidation injection system (PulseOx system <br /> manufactured by Applied Process Technology, Inc ) The system generates ozone, which is <br /> injected with hydrogen peroxide into existing nested injection points <br /> The proposed chemical oxidation event will utilize the three stainless steel nested injection wells, <br /> IPI, IP2, and IP3 (two points at each nested injection well — one for peroxide delivery and one <br /> for ozone delivery) currently installed at the site These nested injection wells were screened in <br /> saturated soils in the source area to allow for the injection of ozone and hydrogen peroxide The <br /> existing soil vapor extraction system will be operated to remove any hydrocarbon vapors from <br /> the vadose zone which may be volatilized during ozone sparging activities <br /> 2.2 CHEMICAL OXIDATION SYSTEM INSTALLATION AND STARTUP <br /> The chemical oxidation system, which is housed in a trailer, will be transported to the site and <br /> connected to the existing electrical and phone services for the site The trailer will be installed <br /> within a fenced enclosure, which will be inside the existing site perimeter fencing <br />' Each of the system alarm interlocks will be tested prior to system startup to confirm the proper <br /> operation of the injection system <br />' The three injection well points will be connected to the injection system Teflon tubing housed <br /> in polyvinyl chloride (PVC) piping will be used for each oxygen/ozone injection point The <br /> hydrogen peroxide piping, which will consist of polyethylene tubing, will also be housed in PVC <br /> piping Each of the injection wells will be fitted with a pressure gauge and check valve as <br /> appropriate for oxygen/ozone and hydrogen peroxide injection The wellhead assemblies will be <br /> installed so that field personnel can readily make adjustments during the pilot test Since the <br /> ozone lines are individually controlled from the equipment trailer, the Teflon tubing will connect <br /> • directly to the stainless steel injection point via a compression fitting <br /> G 1Projects1739421MAST£RlWP%WPO7OnOmne Infection Pilot Test Work Plan doe <br /> 5 <br />